code: def test_singleton(self):
      shape = (2, 1, 8, 7)
      for p in TEST_NDARRAYS:
          arr = p(np.random.rand(*shape))
          out = SplitDim(dim=1)(arr)
          self.assertEqual(out[0].shape, shape)
  
file_path: MONAI/tests/test_splitdim.py
imports: from __future__ import annotations
  import unittest
  import numpy
  from parameterized import parameterized
  from monai.transforms.utility.array import SplitDim
  from tests.utils import TEST_NDARRAYS
label_desc: Use image node_id 2 for calling the TestSplitDim obj's underlying member method code with example usage: obj.test_singleton() without return types